Liquid-fuel-feed device



May 14, 1929. I E. A. FIELD ET AL 1,713,334

LIQUID FUEL FEED DEVICE Filed Nov. 10, 1924 l/VVENTOR Edward H. Field BY ward H. Field Jr:

27 ATTORNEYS Patented May 14, 1929.

UNI ED STATES P E NT' v EDWARDA. FIELD AND'EDWARD A. mat -JR, or, cmcac 'rnnmors, Assmnons;

BY MESNE ASSIGNMENTS, To EDWARD A. FIELD, or CHICAGO, rumors.

vLIQUID-FUEL-FEED DEVICE.

- 1 Application filed uovembe'rio, 1924. Serial Nd. 74 ,940.

I ing of a substantiallyconstantsupply of fuel in a gravity feed tank for liquid fuel burners such, for instance, as shown in our application for Letters Patent filed J une 25, 1923, Serial No. 647,657,.and while we have designed our feedidevice especially for use with the burner asshowntherein, it will be understood that it is adaptedfor use with any type of liquid fuelfeeddevice where the fuelis supplied directly to the burner by gravity as distinguished from apressure feed.

The main'objects of the invention are: r First, to provide an improved feed device of the-class described inwhich a substantially constant supply of. fuelis maintained in the gravityv feed tank, drawing the same from a storage or supply tank. c

Second, to provide an improved feed device having. these advantages which is automatically operated. a Y

Third, to provideanimproved liquid fuel feed device which is simple in its parts and not likely to become inoperative in use.

Further objects, and objects relating to structuraldetails, willdefinitely appearfrom the detailed description to follow.

We accomplish the objects of our invention by-the' devices andmeans describedin the, following specification. The invention is clearly defined andpointed out in the claims.

A structure which is a preferred embodiment of our invention is clearly'illustrated in the accompanying drawing, forming a part of this application, in which 2' Fig, I is a perspective view of a fuel feed equipment embodying the features of our inventiomthe illustration being largely conventionalized and no attempt being made to maintain the parts in their relative proporoperative relation. I r Fig. II is a detail view mainly in vertical central section through the feed control mechanism. j a V Fig. III is a perspective View of the bottom plate of the fuel control mechanism with the parts mounted thereon. 1 In the drawing similar reference characters refer tosimilar parts throughout'the several tions, it beingintended onlyto show their views. The parts will be referredltoby their numbers. I

Referring'to the drawing, 1. representsa; furnace; 2 the fuelstorage or supplyltank and-v 3 the fuel feed tank which is connectedtothe furnace by the pipe lto deliver bygravityto the furnace burner not illustrated. V I

l/Ve provide an'ejector. indicatedat; 5, the ejector having a'water supplyconnection 6 and a water deliveryconnection 7 Thiswa ter supply connection may be any suitable. source of water supply asthe' water supply ufl5 system ofaresidence. I I

The vacuum tank 8 is closed at itsupper, end, being flangedat 9. at its lower end .to {receive the screws 10 for -attaching.the'bottom plate 11 thereto. A gasket l2-is arrangedbe- 7Q tween the flange9 and the bottom. plate so that the tank'is sealed except. forthe connections to be described. Y

Within this tank 8 is an inverted'bucketor float 13. The air suction pipe14 of. the ejecr, I

tor 5 has an upright, terminal 15projecting into the vacuum tank andopening wellrto ward the top ofthe float 13. On theupper end of this suction pipe terminallf) is-an 'upwand- Y 1y facing valve seat 16. A conical valve 1-7Yis,-'

mounted upon thefloati to coact. with this. valve seat so thatwhen the float is in its low.- est position, the-suction pipe is 'cl0sed,but, when open the suction} pipeis open so that. air.v is drawn from the vacuum-.ohamberori tank, by the ejector. j v

On the bottom plate, 11. isa supportingblock 18 having upwardly projecting earsf19 to which the arm 20 of the counterweight 21. is pivoted. The outer end of. this, arm is -00 pivotally connected at 22-to the downwardly projecting arm 23 carried. by a cross; piece 24 within thefloat. This connection serves. the double purpose of a-counterweightfor the float and. a thereof. I

The float: chamber is connected. to .the. fuel. supply tank 2 by meansof the-intake pipe 25 a return check valve 26 for this pipe, being mounted on. the bottom plate 11. v

I The vacuum tank or chamber is .connected by'the discharge pipe-27 to thegravityfeed tank 3. Thebottom plate llhasadOwnward- 'ly facinginclined valve seat.28 for the down guidingmeansfor the lower end.

valveso that the conduitsserves as a liquid discharge and air return COI'ltl'lllf, and; an an conduitopeningat'the upper side of said discharge valve and discharging 'lntOl said tank, an inverted-float disposed in said vac-uum'tank, a suction pipe projecting into said vacuunrta-nk within saidfloat, SfllQlSllU" tion pipe having. an. upwardly facing valve seat at ts upper end, a coactrng valve carried bysaid float andlprovided with a pilot stem" "projecting throughthe valve seat whereby the upper endofrthe floatis guided, a counter-,

weight pivotally:v mounted Within said vacuum tank andpi-votally connected to. said float, an intake connection for said vacuumfitanklbe: low said float, a return check valve for said intake connection, a; discharge valve having a downwardly faeing inclined valve seat and provided with an upwardly projecting supporting and guiding stem, a link connecting said discharge valve stem to said float, and a conduit connecting said discharge valve stem to said delivery tank, the capacity of the conduit exceeding that of the valve so that the conduit serves' as a liquid discharge and air return conduit. r

4. In a-structure of the class described, the combination of a delivery tank, a vacuum tank, an inverted float, disposed in said vacuum tank, a suction pipe projecting into said vacuum tank'withln said float, said sue.-

tion pipe having an upwardly facing valve seat at its upper end, a coact ng valve carried by said float, a counterweight operatively connected to said float, an intake connection for saidvacuum tank below said float,

a return check valve for said intake connection, a discharge valve having a downwardly facing inclined valve seat and provided with an upwardly projecting supporting and guiding stem, a link connecting said discharge valve stem to said float, and a conduit con- 'necting said discharge valve to said delivery tank, the capacity of the conduit exceeding that of the valve so that the conduit serves as a liquid discharge and air return conduit.

5. In a structure of the class described, the combination of a delivery tank, a vacuum tank, an inverted float disposed in said vacuum tank, a suction connection to said vacuum tank opening within said float, a-

valve for said suctionfconnection actuated by said float, a counterweight operatively connected to said float, an'intake connection for said vacuum tank below said float, a return check valve for-said intake connection,

a discharge valve having a downwardly facmg lnclined valve seat and provided with s an upwardly projecting supporting and guidthe capacityot the conduit:exceeding-thatch tank, aninvertedfloat disposed insaid vac U11111 tank, a suction connection-to said vacuum a tankopening within said float, aval've forsai'd 1 suction connection actuated. by. saidffloata acounterweight'operatively connected :to said float, an intake connectionfor: said vacuum tankbelow said float, a return check:valve {for sald intake connection, adischa-rge valve- 11a)" ing'adownwardly facing inclinedvalve seat and provided with an upwardly, projecting u b supporting and gulding stein, a-Khnkconnect ing said discharge valve stenrto said .;floalt-,f flIlCl-LCOIlClLlll] connecting sa d d scharge valve to'said delivery tank, the capacity of the con duit exceeding that of the valve so that the conduit serves as a liquid discharge and air return conduit.

7. In a structure of the class described, the conbinationof a delivery tank, a vacuum tank, an inverted float disposed in said vacuum. tank, a suction pipe projecting into said vacuum tank within said. float,

said suction pipe having an upwardlly facing valve seat at its upper end, a coacting valve carried by said float and provided with a pilotstem projecting through the valve seat whereby the upper end of the float is guided, a counterweight pivand pivotally connected to said float, an intake connection for said vacuum tank provided with a return check valve, a discharge valve operatively connected to said float, and aconduit connecting said discharge valve to said delivery tank, the capacity of the conduit exceeding that of the valveso that the conduit serves as aliquid discharge and air return conduit. 7

8. In a structure of the class described,th combination of a delivery tank, a vacuum tank,

'otally mounted within saidjvacuum tank an inverted float disposed in said'vacuum tank,"a suction pipe projecting into said vacuum tank, within said float, said suction pipe having an upwardly facing valve seat at, its upper end, a coacting valvecarried by said float, an intake connection for said vacuum tank provided with a return check valve,1a discharge valve operatively connected to said float, and a conduit connecting said discharge valve to said delivery tank, the capacity of the conduit exceeding that of the valve so that the conduit-serves as a liquid discharge and air return conduit. ,7 i

9. In a structure of the class described, the combination of a delivery tank, a vacuum tank, an inverted float disposed in said vacuum tank, a suction connection to said vacuum tankopening within said float, a valve for said suction connection actuated by said float, a counterweight, operatively connected to said float, an intake connection to the bottom of said vacuum tank below said float, a return check valve for said intake connection, a discharge valve operatively connected to said float, and a conduit connecting said discharge valve to said delivery tank, the capacity of the conduit exceeding that of the valve so that the conduit serves as a liquid'discharge and air return conduit. l r a v 10. In a structure of the class described, the

combination of a delivery tank, a vacuum tank, an inverted float disposed in said vacatively connected to said float, and a conduit connecting said discharge valve to said delivery tank, the capacity of the conduit exceeding that of the valve so that the conduit serves as a liquid discharge and air return conduit.

11. In a structure of the class described, the combination of a delivery tank, a vacuum tank, an inverted float disposed in said vacuum tank, a suction connection to said vacuum tank opening Within said float, a valve for said suction connection actuated by said float, an intake. connection for said vacuum tank below said float, a return check valve for said intake connection, and a discharge valve operatively connected to said float.

In witness whereof we have hereunto set our hands.

EDWARD A. FIELD. EDWARD A. FIELD, J R. 

